Lamp attachment.



H. J. BRENNECKE & F. IHRCKE.

LAMP ATTACHMENT.

APPLICATION FILED DEC.27, I915.

Patented Dec. 26, 1916.

HERMAN J. BRENNECKE AND FRANK IHRCKILUF CHICAGO, ILLIIQ'QIS.

LAMP ATTACHMENT.

Specification of Letters Patent.

Patented 11cc. 26, 1191160 Application filed December 27, 1915. Serial No. 68,704.

To all whom it may concern Be it known that we, HERMAN J. BREN- NECKE and FRANK IHRCKE, citizens of the United States, residing at Chicago, in the county of Cook and State of Ill1no1s, have invented certain new and useful Improve.

ments in Lamp Attachments, of which the following is a specification.

Our invention relates to lighting effects and has particular reference to improvements for modifying the injurious effects upon vision of the ordinary rays of light.

The objects of the invention are to neet a general demand for simple, comparatively inexpensive, and very conveniently applied color caps or shades for, particularly, electric light bulbs of conventional form, and-to provide a construction which enables large quantities to be packed in small store space, which may be shipped atsmall cost intransportation charges, which, is not sub ect to the usual breakage accidents, and whlch is so inexpensive as to be available for everybody not able or willing to provide the more elaborate and costly devices for this purose.

With these objects in view our invention consists in the novel construction, combina tion and arrangement of parts all as hereinafter described in detail, illustrated in the accompanying drawing, and more particularly pointed out in the appended claims.

In the drawing-Figure 1 is a perspective View of an electric light bulb and our invention applied thereto. Fig. 2 is a plan view of the flat blank ready to be bent and fashioned as in Figs. 1 and 3. Fig. 3 is a perspective view on a reduced scale of the cap shown in Fig. 1 provided-with hooked in spring wire clamp members instead of the cord shown in Fig. 1. Fig. 4 is another modification of the clamping portion, Fig. 4 representing a coiled spring with hook ends. Fig, 5 represents a modified form of cap or shade. Fig. 6 represents the same fiattened'out for shipment or storage in the same manner shown in Fig. 2.

In the Figs. 1, 2, 3 and 4 construction the body of the shade or cap is a segment of a circular disk 2 representing the body of the cap. This disk, which may be of celluloid or any suitable material, has two straight edges 3 and 4 which meet at an obtuse angle, as shown in Fig. 2, when flattened out as in said figure. Near the edge 3 are cut a pair of short perforating slots 5 and 6 and a.

similar pair 7., and 8 and in the part 4 are cut-outs forming lugs 5, 6, 7, and 8 adapted to be bent out and inserted into the slots, the elasticity of the material tending to return the lugs to their flat position and thereby bind the edges together as shown in Fig. 1. Near the circular edge of the blank are small holes 9, 10, 11, 12, and 13, two of which9 and 13are brought into register with, or opposite, each other. These two holes with the remaining three holes are, substantially at the corners of a rectangular figure formed by a cord fastener 14 having runs 15 and 16 which are parallel and form an elastic clamp engaging the body of the bulb17. The ends of this cord are tied as at 18 after the cord has been suitably tensioned. In Fig. 3 the runs 15 and 16 are represented by a pair of wires 19 and 20 having hooked ends that engage the holes as shown. In Fig. 4 each of the runs 15 and 16 takes the form of a coiled spring 21 with end hooks 22 and 23 to be engaged with the perforations 9 to 13. The engagement of the cord or hook with the pair of registering holes 9 and 13 serves as an additional fastener holding the edges'3 and 4 overlapped and these holes alone may be utilized for that purpose, especially when the cord is used, for the purpose of not only holding the cap to its conical form, but the elasticity in the body tending to return it to-fiat position and to separate the holes 9 and 13 and the edges 3' and 4 exerts a tension upon the cord and holds it taut.

In the modification shown in Figs. 5 and 6 the disk24-is of circular form and is permitted to remain flat in service while the knock down feature is confined to the lamp-gripping means. The latter in the Figs. 5 and 6 construction take the form of a pair of spring-bars 25 and 26 which cross each other at right angles and are riveted together and to the disk 24 by means of a rivet, or other fastener, 27. The bars 25 and 26 are bent as in Fig. 5 to form, respectively, a'pair of clamp jaws 28 and 29 and a pair30 and 31 which grip the body of the lamp 17 and which maybe flattened down for packing or storage as in Fig. 5.

Both of the above described forms of con struction embody the same ideas, form a light structure that is very convenient to apply, does not involve any special care to avoid breakage, and if broken is replaceable at insignificant cost, may be quickly flattened supply the necessary spring tension to hold the runs of the cord sufiiciently taut for the purpose. The spring coils 21 are adapted for more rigid material for the cap and re.

lieve the latter of the tensioning function. The wires 19 and 20 are likewise intended to relieve the cap of the tensioning function and are intended to be of light construction adapted for very thin celluloid, or the like, suitably colored to modify the light. These wires are preferably in the form of a staple with a connective portion 19 and ends 22 and 23 in the form of hooks similar to the hooks on the helical spring 21, andare, as shown, made longer than the. cap openin they span, so that when they are forced apart in the manner indicated in Fig. 1 and their-opposite ends are drawn inward they .will not engage the cap to contract it, or distort it into a slightly oblong form, but will leave the normal configuration of the rim of the cap undisturbed. The Fig. 3 construction is therefore well adapted for the delicate type of cap and for the low cost and weight necessary to meet the needs of the greater body of consumers.

of a segmental disk having straight edges .which overlap and integral fasteners to retain the conical form of said disk, and a pair of parallel spring wires or cords spanning the opening into said cap and engageable with said lamp to be supported thereby.

2. A colored transparent cap for a lamp consisting of a disk cut and bent to conical form, and flexible wires loosely mounted in perforations near the edges of said cap, said wires adapted to be sprung apart over a lamp and having projecting slidable end portions which are free of cap contracting engagement with said cap when bent apart as specified.

In testimony whereof we have hereunto signed our names.

HERMAN J. BRENNECKE. FRANK IHROKE. 

